package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetMealDishMapper setMealDishMapper;
    /**
     * 新增菜品
     * @param dishDTO
     */
    public void addDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        //将属性赋值给dish
        BeanUtils.copyProperties(dishDTO, dish);

        //加入到dish表
        dishMapper.addDish(dish);

        //得到菜品id
        Long id = dish.getId();

        //加入到dish_flavor表
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //为每个口味赋值菜品id
            flavors.forEach(flavor -> {
                flavor.setDishId(id);
            });
        }
        dishFlavorMapper.addFlavor(flavors);
    }

    /**
     * 菜品分页查询
     * @param queryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO queryDTO) {
        PageHelper.startPage(queryDTO.getPage(),queryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(queryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param dishIds
     */
    @Transactional
    public void deleteByIds(List<Long> dishIds) {
        //判断当前菜品能否能删除--是否存在起售的菜品？
        for (Long dishId : dishIds) {
            Dish dish = dishMapper.getById(dishId);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品能否能删除--是否被套餐关联了？
        List<Long> ids = setMealDishMapper.getMealDishId(dishIds);
        if (ids != null && ids.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //批量删除菜品表的菜品数据
        dishMapper.deleteDish(dishIds);
        //批量删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(dishIds);
    }

    /**
     * 根据id查询菜品和口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Transactional
    public void updateDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //修改菜品表基本信息
        dishMapper.updateDish(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //为每个口味赋值菜品id
            flavors.forEach(flavor -> {
                flavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.addFlavor(flavors);
        }


    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 菜品起售停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status,id);
    }
}
